Re: Wood Chips Bridge
"The fuel is mainly 2'' woodchips and other types of biomass."
So it could be almost anything!!
"I was thinking about using a bucket elevator.."
Fine for wood chips, but what about the rest of the stuff that you need to handle but haven't described??
"Using a conveyor with weight sensors.."
A weigh belt conveyor, would that be before or after the bucket elevator?
"..the location where the buckets pick up the fuel could still bridge.."
Bucket elevators should not be flood fed, you will need to ensure it is fed at a predetermined rate with a well designed chute into the elevator.
It would also help if you gave the required rate (te/hr) and material density (kg/m3). ■
Re: Wood Chips Bridge
The system must be able to work with almost all biomass: wood chips, wood pellets, manuer (horse, cow, chicken), switchgrass, hog fuel, diinking sludge, coal, limestone powder... etc.
A bucket elevator or a really inclined auger might work.
The conveyor would be used to drop the fuel right into the unit (it could potentially be a weighfeeder) so it would come after the elevator since the fuel must first be displaced.
We need about 200-250kg/hr.
I found some fuel densities on this website: http://www.woodgas.com/fueldensities.htm
Thanks in advance for your help!
I was also informed that the upper level (where the fuel will be fed) vibrates a lot so a hopper on a scale may not work properly there. I'm not familiar with the different methods of measuring fuel rate. The fuel could be lifted to the upper level (in barrels) using a crane and then it could be fed into the unit. I really don't know what the best method is. ■
Working Underpile Reclaimers
We have had excellent success using a Laidig www.laidig.com underpiler reclaimer for handling biomass in several locations in British Columbia, Alberta and elsewhere. Please contact me for more information. ■
Re: Working Underpile Reclaimers
Originally posted by Douglas Ballard
We have had excellent success using a Laidig www.laidig.com underpiler reclaimer for handling biomass in several locations in British Columbia, Alberta and elsewhere. Please contact me for more information.
At 200 kg/hr?? ■
Working Underpile Reclaimers
This appears to be a very small rate? I think you would be much better off with a drag conveyor rather than a bucket elevator or screw due to the material variability. ■
Re: Wood Chips Bridge
oh goodness.
Okay, well the design has changed. There are already some cranes in the building but they cannot lift the barrels of fuel to the exact location required. I looked online and found this website for barrel lifters/dumpers http://www.fsindustries.com/moreinf...pourers.shtml
The cheapest model would fit my purposes (assuming the hopper is not too high).
Now I simply need some type of hopper/auger contraption that has variable speeds and a scale so that the correct feeding rate can be achieved. Does such a thing exist? Can anyone give me company websites with such products? Right now where I work they have a combined hopper and auger which works very well but it has no scale and only one speed.
Another problem arises in the bridging of woodchips, as I described earlier. If one were to take a stick and poke in the hopper to ease up the woodchips the scale would read the disruption. So, I still need 200-250kg/hr. ■
Bridging Of Wood Chips
this problem has been resolved on a variety of wood wastes including chips, saw dust, bark shreddings, by the use of vibrating floors on 6 to 10° slopes. Please view silexport.com or contac us for details
JC Poncet ■
Wood chips bridge
Hi all!
I'm a co-op student working on a design for a feeding system.
I need to create some sort of system that can first vertically displace the fuel up approx. 1-2 stories and then feed into a combustor at a specified feed rate.
I don't know much about this, so I was hoping someone out there could help!
The fuel is mainly 2'' woodchips and other types of biomass. Of course the problem with this is that woodchips often bridge in hoppers and metering bins, stopping the feed.
I was thinking about using a bucket elevator to lift the woodchips up and then using a conveyor to feed them into the combustor.
Does anyone know what the best system would be to avoid bridging? Using a conveyor with weight sensors would probably be better than a metering bin & auger I would think. But the location where the buckets pick up the fuel could still bridge. Any helpful advice? ■